public BulkDetailsResponse bulkDetails(List<String> packageNames) throws IOException {
Builder bulkDetailsRequestBuilder = BulkDetailsRequest.newBuilder();
bulkDetailsRequestBuilder.addAllDocid(packageNames);
ResponseWrapper responseWrapper = executePOSTRequest(BULKDETAILS_URL, bulkDetailsRequestBuilder.build().toByteArray(),
"application/x-protobuf");
return responseWrapper.getPayload().getBulkDetailsResponse();
}